Self-locking control device



G. DE BoNAL' Er AL SELF LOCKING CONTROL DEVCE June 17, 1930.

Filed-Nov. 13. 1928 2 Sheets-Sheet 1 .ZL/venan,

anl l E ne? Erre /yazssan/ 2]' ww f June 17, 1930. G; DE BONAL ET AL1,764,937

SELF LOCKING CONTROL DEVICE` Filed Nov. ,13. 1928 2 sheets-sheet 2 13.5n n (rig. 1)..

Patented June 17, 1930Y i UNITED STAT-as .PATENT 'oF-Flos f i ,emrAnEBoNAn-,o'r GENAS, AND PIERRE MASSON, oF VILLEURBANNE, Emmen Semanalescome@ 41.11Ev11111 animation ne@ .noemer 1,3, was. aan No. ,319.136, mi111 France Nwmbr 1e, 1.927,.,

My invention relates Yto a device adapted to loclramechanism in anydesired position whilepermitting its hand control. Devices of this kindareknofwn, which emi 5 body teeth and movableV keys. rThey,provide Iastep-by-step regulation, not a continuously progressive one.

' In my French p atentfiled November 16th, `1927, I have galso describeda device insur- 10 ing ayprogress-ive regulation and a self-lool;-

`ing action, by means 4of shoes, gammed 'between a movable member and aXed one.

y The device according vto the present "fin- 'vention comprises membersprovided with 115 ratchet teeth and means adapted Vto Unlock the teethbeforeacting on Ithe mechanisin'tc which thedevice is'adapted.

My invention Yisfmore particularly `intended for useon automobiles, forthe hand 130 control ofthe br`akes,in lieuV of the ordinary lever lockedlby means `of teeth and amovablekey.` In 'such a case, Vthe mechanism isto be locked only in one direction, against Vthe springs restoring thevbrake shoes totheir 125 inactive position. But in other applications,

1,30 the mechanism' to Vwhich it adapted, in

Fig. Qis a cross-section of the same online Fig. 3 -is"a cross-sectionon line III-#III (Fg.v1)-.f 1 f 4:2'isa'longitudinal sec-tien of the jamming-plate alongline'IV--IV (.Figf).

40 Figs. `to Tdiagrammatically Lillustrate the working of the device, Y

The device comprisesa shaft l vto a frame Qby means' of a -nut `'Ihisshaft is madefwith an integral flangtigell and it .is-pro- ,45 Vv-dedwith a portion `5 rectangular insection, on which fits a second fia-nge6. @ntl-1e threaded lend of sha-ft l arescrewed two nuts 1' and 8. c

y A plate 9, which will be termed'hereafter 50 .the master-plate, isloose on sha-ft 1,bef

.jecting from element A13 (Fig. 1 3). c A. spring 28 connects elements12 and V13 tween flanges 4 and 6. This plate is provided with a tail 10to which is attached the .cable or rod which connects the devicemechanism 'to be controlled.

Another plate, "termed the "jamming plate, is loose en!V the hub 11 ofplate i as shown.

These elements are provided ratchet -teeth on their Vfaces which Contactwithfplate c teeth of element 12 arefdirected `clockwise (Fig. '3) andthe teeth of clement .-13 are directedanticlocliwisel V*Plate 9 is also--provided withteeth arrangedfto cooperate with the teethfof elements l2and 13.

Disks lef and 15,1nade of impregnated wood, be-r, leather or any other`suitable mate-rial havinga high frictional coeiicient, are interposed'between the master plate-9 and flange 4 and between the jamming plate'12*18 and Yange 6. 1

A A'hub -16 is arranged to rotate freely on flanges 4 and 6. This `hubis integral with the `driving handle 17. "It comprises three radialopenings, the'lirsvt nelSfovf the free passage of tail l0 (Fig. 2), `asecond one `1.9 oratail 2() projectingradially from toothed element 12,athird one 2l `for a tail-22 protogether and `tends `to lg'otate thesanieavijth respect toeach other in such a directionthat 4the plates arepressed towards the flanges nnder the action of the 'ratchet teeth. c gThe working of the device vwill be readily understood fr)11i1Figs. l5(and 7 whiclrdiagrammatieally represent a developnientV the device, or,i'preerBed, a deviceo the same kind, arranged for rectilinear motion.The,master-plate@ and the T elemeiitsfl-Q-"l 0f the amitiee plate are in'the 911m ef slides cooperating" together between guides 4. and 6. VAsclearly shown, they traction spring `23,-tends to "jam `the memberstogether under the action of the inclined edges n iesf .3 @d 14) .lfiese-with respect to each other, leach one comprisc ico that the force F, asillustrated, will jam to- Y gether the plate 9 and theelement12'if-theangle of the inclined edges of the teeth is small enough. The deviceisthereby locked.v

When the handle 17 is moved inthe direction of force F (Fig. '6),' thelinger 19 of the fork 19-19 through which ispassed the tail 2,0 ofelement 12, engages tail 20. VAny further movement of rod'16 tends-tounlock element 12. But, as soon as the same is unlocked, plate 9 movesunder theaction of force Fand the membersare again locked together.

Ofcourse, this'necessitates that the finger A'of the fork21 -v21' 'does4not engage tail 22. tail does not engage thesame before finger 19.engages tail 20, and also that finger 21 vof the yoke 21-21 does notengage tail 22.

When `handle 17 is moved in the reverse directionk (Fig. 7 finger21jcooperates with tail 22 and element 13 isN unlocked from plate 49.For Aafurther movement of rod 16,;linger 18 cooperates Vwith ltail 10yand plateg9 ris, positively driven., i The element 13beingunlocked,plate 9 yma be freely moved against force F, provided linger 19 does notengage tail before finger 18" engages tail 10 (which would jam, element112 against plate 9). Whenhandle 17 is released, forceF again locksplate 9.and element 12 together. Y

Since' the device is vsymmetrical Vin construction, it will work ,in thesame manner when the force Fis reversed in.- direction so .that handle'lthus permits the control of the mechanismrepresented by force F, whatever mayfbe the direction of this force?. Y

The :above description witligreference to Figs. 5 to k7, isreadilyapplicabletoztlie apparatus of Figs. 1 to 4i. Disks` lfland 15, having ahigh frictional, coefficient, avoid any incidental slipping in thepresence of oil or grease and: nuts? and 8 permit the-adjustment ofthe'axial play compensation of the wear. q

When the mechanism tol be controlled exerts on thedevice a.forceof-constant direction (which is tlie'ca'se-for an automobile brake,for instance) ,one element'off the jamming plate may be dispensed with.;For example, if the force F. (Figs. 5 to 7) has always thedirection'represented, element 13 4may be omitted, spring 2,3 beingattached to plate 9 so as to always tend to jam plate 9 and element 12ytogether. The jamming plate is then practically a circular platesimillar to plate 9 (Figs. liteit). The working of the plates and thevfirst-'named ratchet teethV being-adapted to cooperate ywith thesecond-named ratchet teeth ,f-fixed surfaces between which said masterand jamming members areinterposed;

spring means adapted to move saidja'mming Vmember in suchl a `directionthat said master jand yjamming members are separated from each otherunder theV actionof said ratchet teeth and are jthus pressed and jammedagainstsaid-fixed surfaces, whereby the dc.

vice islocked; and control means adapted to unlock said jamming memberand'to drive said master member.

f2. Adevice as claimed inclaim 1, wherein the master and jamming membersare inthe formy of` plates havingacommon axis and provided` with ratchetteeth on their contacting faces.

3. A device as claimed iny claiml 1, wherein the .l springmeanscomprises a spring connected to [both: parts of the-jamming member andadaptedto move 'thesamewith respect to each other so asto jamrthedevice.

Q4. A'l device ofl thecharacter and for the purpose `described,comprising a rmovable Nmaster plate connected tothemechanism to becontrolled; a movable jamming plate coaxial. witlisalid master plate;ratchet teeth on said master plate; ratchet teeth on said 'amming-plate,Athe lfirst-named ratchet teeth eing' adapted tocooperate with thesecondnamed ratchet teeth; fixed flanges between which saidplatesareenclosed; spring means adapted tov move said amming'plate in such adirection that said master and jamminc."

Vplates are separated 'from eachother under theactionjoffvsaid ratchet'teeth and are thus pressed and jammed against said fixed flanges,whereby .the device is lockedyand a control hub co-axial withysaidplatesand `provided with means to'unlock said amming plate and todrive said master plate.

5; .A device'as claimed in claimAf, wherein the ,master and'jammingplatesl are provided with. radial tails projecting through aperl t-uresprovided inthe control hub, said'v tails and ,'apertures'beingsolocatedV and dimensioned that, when said controlfhub is rotated .in onedirection, itunlocks the j ammingplate, and, for the other direction, itdirectly drives the "master plate.`

6. A1device iofthe character and forthe purpose described, comprising amovable master,l member connected with the mechanism to Vbe controlled amovable jamming member cooperating with said master member, said ammingmember being formed of two elements loose with respect to each other;ratchet teeth on each element of said jamming member, the teeth of oneelement being inverted in direction with respect to those of the otherone; ratchetteeth on said master member adapted Vto cooperate with thefirst-named teeth of said jamming member; fixed surfaces between whichsaid master and jamming members are interposed; spring means adapted tomove the elements of said jamming member with respect to each other insuch a direction that said master and jamming members are separated fromeach other under the action of said ratchet teeth and are thus pressedand jammed against said fixed surfaces, whereby the. device is locked;and control means adapted to unlock said jamming member and to drivesaid master member.

7. A device as claimed in claim 6, wherein the master member is in theform of a plate, s

the jamming member being formed of two elements each comprising acentral hub and two opposite sectors, said elements being arrangedcrosswise so as to form a composite jamming plate, said master and'jamming plates being co-aXial and provided with ratchet teeth ontheircontacting faces.

8. A device as claimed in claim 6, wherein the spring means comprises Vaspringlconnected to both elements of the jamming member. Y

9. A device of the character and for the purpose described, comprising amaster plate connected to the mechanism to be controlled; a jammingplate co-aXial vwith said master plate, said jamming plate being formedof two elements loose with respect to each other, each comprising acentral hub and two opposite sectors, said elements being arrangedcrosswise so as to form a composite jamming plate; ratchet teeth on eachelement of said jamming plate, the teeth o'f one element being invertedin direction with respect to those of the other one; ratchet teeth onsaid master plate adapted to cooperate with the` firstnamed teeth ofsaid jamming plate; fixed flanges between which said master. and jammingplates are enclosed; spring means Y adapted to move the elements ofsaidjamming plate with respect to eachother in such a. direction thatsaid master and jamming plates are separated from each other under theaction of said ratchet teeth and are thus pressed and jammed againstsaid fixed flanges, whereby the device is locked; and a control hubco-axial with said plates and provided with means to unlock said jammingplate and to drive said master plate. j

l0. A device as claimed in claim 9, wherein the master platefand eachelement of the jamming plate are provided with radial tails projectingthrough apertures provided in the the jamming plate and then drives themaster plate..

In testimony whereof we aliix our signatures.

GUY DE BONAL. PIERRE MASSON.

